NDLI: Differential uptake of soluble organic and inorganic nitrogen by two fruit species: Dimocarpus longan Lour. and Eriobotrya japonica Lindl.

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Differential uptake of soluble organic and inorganic nitrogen by two fruit species: Dimocarpus longan Lour. and Eriobotrya japonica Lindl.

Content Provider	Springer Nature Link
Author	Zhou, Biqing Zhang, Liming Yang, Wenhao Mao, Yanlin Chen, Chengrong Xing, Shihe
Copyright Year	2016
Abstract	The aim of this study was to investigate whether two subtropical fruit species, Dimocarpus longan Lour. (Wulonglin) and Eriobotrya japonica Lindl. (Zaozhong 6), could directly take up soluble organic nitrogen (N), and if there was differential uptake of different forms of N between the two species.The stable isotopic tracing experiment was carried out using three $^{15}$N-labeled tracers [glycine-2-$^{13}$C-$^{15}$N, ($^{15}$NH$_{4}$)$_{2}$SO$_{4}$, and K($^{15}$NO$_{3}$)] to examine the short-term (2, 6, and 72 h) uptake and distribution pattern of N within the plant in 1-year-old seedlings of both fruit species.After glycine-2-$^{13}$C-$^{15}$N application, the ratios of $^{13}$C to $^{15}$N concentration in the roots and whole seedlings of both Wulonglin and Zaozhong 6 were close to 1:1 at 2 and 6 h, respectively, showing that both fruit species could directly take up intact glycine. The $^{15}$NH$_{4}$ $^{+}$ absorbed by Wulonglin and Zaozhong 6 whole seedlings in the ($^{15}$NH$_{4}$)$_{2}$SO$_{4}$ treatment were 13.2 and 9.2 times higher than glycine-derived-$^{15}$N, while $^{15}$NO$_{3}$ $^{−}$ absorbed in the K($^{15}$NO$_{3}$) treatment were 27.7 and 7.7 times higher than glycine-derived-$^{15}$N in the glycine-2-$^{13}$C-$^{15}$N treatment, respectively. This indicated that soluble organic N might not be the dominant N source taken up by both fruit species. Results also showed that Wulonglin preferred NO$_{3}$ $^{−}$, while Zaozhong 6 preferred NH$_{4}$ $^{+}$. The greater uptake of $^{15}$NH$_{4}$ $^{+}$ and $^{15}$NO$_{3}$ $^{−}$ than glycine-derived-$^{15}$N by both fruit species might be related to their long-term adaptation to the supply of large quantity of inorganic N via fertilization. To elucidate the mechanisms responsible for the differential uptake of different forms of N by these two fruit species, further studies on mycorrhizal associations, transporter genes, and glycine metabolisms are warranted.This study has demonstrated that both D. longan Lour. and E. japonica Lindl. seedlings were able to take up intact glycine directly, while the NO$_{3}$ $^{−}$ and NH$_{4}$ $^{+}$ were still dominant N forms absorbed by both fruit species.
Starting Page	1579
Ending Page	1587
Page Count	9
File Format	PDF
ISSN	14390108
Journal	Journal of Soils and Sediments
Volume Number	17
Issue Number	6
e-ISSN	16147480
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-12-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dimocarpus longan Lour. Eriobotrya japonica Lindl. Glycine-2-$^{13}$C-$^{15}$N Isotope tracing Uptake Soil Science & Conservation Environment Environmental Physics
Content Type	Text
Resource Type	Article
Subject	Stratigraphy Earth-Surface Processes

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